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Q: What century did mathematician first used plus and minus signs?

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the 16th century, specifically 1544.

Robert Recorde, who designed the equals sign, introduced plus and minus in 1557. Brahmagupta was an Indian mathematician who invented the multiplication sign around the 19th century. Johann Rahn first used the division sign in his book Teutshe algebra in 1659.

Because both minus signs to be cut therefore minus * minus will be treated as plus numbers

Work the problem the same as usual, but then prefix the answer with the appropriate sign. First perform the division--numerator divided by the denominator--without regard to the sign. The sign of your answer depends on the combination of the signs of the numerator, the denominator, and the fraction itself. * If there are an even number of minus signs, the answer is positive. * If there are an odd number of minus signs, the answer is negative. * If there are an no minus signs, the answer is positive.

Plus and Minus Signs

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the 16th century, specifically 1544.

15th Century by Johannes Widmann

15th Century by Johannes Widmann

15th Century by Johannes Widmann

19th century.....sorry this is all i know....

Robert Recorde, who designed the equals sign, introduced plus and minus in 1557. Brahmagupta was an Indian mathematician who invented the multiplication sign around the 19th century. Johann Rahn first used the division sign in his book Teutshe algebra in 1659.

At the end of the nineteenth century, luminous signs were a new phenomenon.

Because of the three minus signs, i.e. an odd number of minus signs, the answer is negative.

Terms are in expressions that separate by plus or minus signs. The answer is TERMS.

Because of the three minus signs, i.e. an odd number of minus signs, the answer is negative.

Because both minus signs to be cut therefore minus * minus will be treated as plus numbers

Same mathematical signs equal plus Different mathematical signs equal minus Plus Plus = Plus (+)(+) = + Minus Minus = Plus (-)(-) = + Plus Minus = Minus (+)(-) = - Minus Plus = Minus (-)(+) = - So the direct answer to your question would be: plus minus equals minus

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